Device for controlling constant power of excavator

Abstract

The invention provides a power adjusting system of a plunger type duplex tilting tray variable pump. The system comprises a pressure sensing transmitter set, the plunger type duplex tilting tray variable pump, a power adjusting module, a computer host controller and an engine. A measurement numerical value of the pressure sensing transmitter set is transmitted to the computer host controller; the computer host controller adjusts the plunger type duplex tilting tray variable pump through the power adjusting module; the computer host controller comprises a three-dimensional dot-matrix type MCU constant power controller composed of a single chip microcomputer; curvilinear coordinate parameters with lattice parameters composed of three-dimensional arrays are searched according to numerical numbers, collected by the pressure sensing transmitter set, of pressure output by the plunger type duplex tilting tray variable pump, then the power adjusting module is controlled to adjust flow output by the plunger type duplex tilting tray variable pump, so that power, absorbed by the plunger type duplex tilting tray variable pump, of the engine keeps constant, the plunger type duplex tilting tray variable pump is adjusted in a mode approaching to a real constant power curve in the practical work process, the capacity of the engine can be played fully, the flow of the plunger type duplex tilting tray variable pump when a system overflows can be lowered greatly, power loss is reduced and fuel oil is saved.

Description

technical field [0001] The invention relates to the field of mechatronics, in particular to an excavator constant power control device, in particular to a power control system for a plunger-type double swash plate variable pump in the hydraulic system of the excavator. Background technique [0002] Power control of hydraulic excavators has always been a technical problem that needs to be improved. The purpose of power control is mainly to save energy, improve power utilization and enhance operating efficiency. The early excavator hydraulic system used a quantitative pump oil supply system, but its power utilization effect was not good, and it could not obtain better control functions, and it has been gradually replaced by new technologies. At present, the constant power control system is commonly used in large and medium-sized excavators. At the end of the 20th century, on the basis of the constant power control system, control systems such as negative flow control appeared...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem of power loss caused by the inconsistency between the actual constant power curve and the theoretical constant power curve of the plunger type double swash plate variable pump in the prior art, and to provide a plunger type double swash plate variable pump. Power conditioning system, thereby overcoming the deficiencies of existing technologies

Images